Copy a file to Client - Access Denied

Hello,

I am a newbie on Microsoft Dynamics NAV. My version is 2013 R2.

I want to Copy a .dll file on C:\Program Files (x86)\Microsoft Dynamics NAV\71\RoleTailored Client\Add-ins Folder

to

C:\Program Files (x86)\Microsoft Dynamics NAV\71\RoleTailored Client\Add-ins folder on Client.

And I use CodeUnit 419 File Management for copying.

FileManagement.DownloadToFile('C:\Program Files (x86)\Microsoft Dynamics NAV\71\RoleTailored Client\Add-ins\EFatura.dll','C:\Program Files (x86)\Microsoft Dynamics NAV\71\RoleTailored Client\Add-ins\EFatura.dll');

When i give Add-ins File to Everyone authentication from Security tab, it copies to Client. But there is 50 Client PC and i dont want to connect and give authentication process to all of them.

How can i copy in proper way from C/AL.

Thanks for your replies.